Slow cooker Roast Beef

Outside  round Roast Beef               1.1/2 kg
Onion chopped                                1
Celery                                              2 stems sliced
Carrots sliced                                   1
Green pepper                                    1 optional
Black pepper                                     1 tsp
Garlic powder                                    1 tsp
Salt                                                     1/2 tsp
Soy sauce                                          3 tbsp
Ketchup                                              2 tbsp

Marinade the Beef with black pepper, soy sauce, Garlic, ketchup and salt. Place the onion celery  and carrots slices in the slow cooker.Place marinated beef on top of the vegetables . add water to cook. water should come up to about 1/2 of the beef. Cover the pot and cook in low heat for about 6 hrs.